When your diesel vehicle needs attention, TJC Automotive delivers reliable solutions that keep you moving. Serving Centereach, NY and throughout Suffolk County, NY, we specialize in comprehensive diesel repair for trucks and commercial vehicles of all makes and models.

Our locally owned shop combines dealership-level training with over 15 years of hands-on experience. We're Cummins certified, Chrysler certified, Chevy certified, and ASC certified, ensuring your diesel engine receives the skilled care it deserves. Dealing with performance issues, routine maintenance, or complex diagnostics? We can help. Ready to get started? Contact us for a free estimate within 24 hours.

Your commercial diesel truck is essential to your business, and we understand the importance of minimizing downtime. We provide comprehensive service and repairs for commercial diesel vehicles throughout Suffolk County, NY, ensuring your fleet stays on the road and productive.

As a Cummins certified facility, we have the specialized knowledge and tools to properly diagnose and repair your Cummins diesel engine. From routine maintenance to major repairs, we handle every Cummins service need with precision and care.

Modern diesel engines are complex, and accurate diagnostics are crucial for effective repairs. Our advanced diagnostic equipment and dealership-trained technicians quickly identify issues, saving you time and money while ensuring the right fix the first time.

We're Chevy certified and experienced in all aspects of Duramax diesel repair and maintenance. Your Duramax needs fuel system work, turbo service, or engine diagnostics? Our team has the expertise to handle it properly.

When your diesel vehicle can't make it to the shop, we'll come to you. Our mobile diesel repair service brings professional diagnostics and repairs directly to your location throughout Suffolk County, NY, getting you back on schedule faster.

Our Chrysler certification and extensive Ford diesel experience make us your trusted source for Powerstroke repair. We handle everything from routine oil changes to injector replacement, keeping your Powerstroke running strong for years to come.